Image:Dimenx.jpg|right|300px|thumb|This advertisement for ''Dimension X'' promotes an adaptation of a Frank M. Robinson story from ''Analog Science Fiction and Fact|Astounding Science Fiction'' (September 1951) about a politician who purchases an elixir of life and then hires a detective to investigate the seller. The drawing is signed "J.M."
'''''Dimension X''''' was an NBC
radio program broadcast on an unsponsored, sustaining basis from April 8, 1950 to September 29, 1951. The first 13 episodes were broadcast live, and the remainder were pre-recorded. Fred Wiehe and Edward King were the directors, and Norman Rose
was heard as both announcer and narrator (his famous opening: "Adventures in time and space... told in future tense...").